Queries in Top Queries by Total split into separate items

SEarle86

What is the difference between these queries in the Top Queries section ordered by total in the Server Overview page?

The top two have executed millions of times in the selected time period and have one entry showing the total execution count, however the third query has a dropdown list of "queries with the same hash" which shows 31 different items (all the same query and hash) each with 2 executions

Why is the third entry split into a list, why is it not just one entry like the first two?

SEarle86

I have worked it out, I think. For each entry in the sub list (31 entries)  the query is part of a different batch